About Sir William Lockhart of Lee

Wikipedia Biographical Summary

"Sir William Lockhart of Lee (1621–1675), after fighting on the side of Charles I in the English Civil War, attached himself to Oliver Cromwell, whose niece he married, and who later appointed Lockhart commissioner for the administration of justice in Scotland in 1652. He was also the English ambassador at the French court in 1656, where he greatly distinguished himself by his successful diplomacy. He also served at the Battle of the Dunes...

...He was the eldest son of James Lockhart of Lee (d. 1674). Sir George Lockhart (Lord Advocate) (c. 1630-1689) who was lord-advocate in Cromwell's time, was the second son of Sir James."